Web项目框架搭建【二】——Spring+Spring MVC+MyBatis 整合
Spring + Spring MVC + MyBatis 整合
此次整合我分两个配置文件:
1)分别是spring-mybatis.xml,包含spring和mybatis的配置文件,
2)还有个是spring-mvc的配置文件,
3)此外有2个资源文件:jdbc.propertis和log4j.properties
以下是框架版本及来源:
Spring 4.0.2 RELEASE(PS:无需手动下载,Maven会自动下)
Spring MVC 4.0.2 RELEASE(PS:无需手动下载,Maven会自动下)
MyBatis 3.2.6(下载:https://github.com/mybatis/mybatis-3/releases?after=mybatis-3.2.7)
*设置 xml 文件的代码提示功能
打 开 Eclipse 依次选择 Window > Preferences > Xml > Xml Files > Editor > Content Assist > Auto activation > Prompt when these characters are inserted,设置框中默认是 <=: ,改成<=:qwertyuioplkjhgfdsazxcvbnm就ok了。
下面是项目完整结构,先有个印象:
4.1 Maven引入需要的jar包
为了方便后面说的时候不需要引入JAR包,这里直接给出所有需要的JAR包,这都是基本的JAR包,每个包的是干什么的都有注释
pom.xml
1 <properties> 2 <!-- spring版本号 --> 3 <spring.version>4.0.2.RELEASE</spring.version> 4 <!-- mybatis版本号 --> 5 <mybatis.version>3.2.6</mybatis.version> 6 <!-- log4j日志文件管理包版本 --> 7 <slf4j.version>1.7.7</slf4j.version> 8 <log4j.version>1.2.17</log4j.version> 9 </properties> 10 <dependencies> 11 <dependency> 12 <groupId>junit</groupId> 13 <artifactId>junit</artifactId> 14 <version>3.8.1</version> 15 <scope>test</scope> 16 </dependency> 17 <!-- 导入java ee jar包(可以去除index.jsp报错) --> 18 <dependency> 19 <groupId>javax</groupId> 20 <artifactId>javaee-api</artifactId> 21 <version>7.0</version> 22 </dependency> 23 <dependency> 24 <groupId>junit</groupId> 25 <artifactId>junit</artifactId> 26 <version>4.11</version> 27 <!-- 表示开发的时候引入,发布的时候不会加载此包 --> 28 <scope>test</scope> 29 </dependency> 30 <!-- spring核心包 --> 31 <dependency> 32 <groupId>org.springframework</groupId> 33 <artifactId>spring-core</artifactId> 34 <version>${spring.version}</version> 35 </dependency> 36 <dependency> 37 <groupId>org.springframework</groupId> 38 <artifactId>spring-web</artifactId> 39 <version>${spring.version}</version> 40 </dependency> 41 <dependency> 42 <groupId>org.springframework</groupId> 43 <artifactId>spring-oxm</artifactId> 44 <version>${spring.version}</version> 45 </dependency> 46 <dependency> 47 <groupId>org.springframework</groupId> 48 <artifactId>spring-tx</artifactId> 49 <version>${spring.version}</version> 50 </dependency> 51 <dependency> 52 <groupId>org.springframework</groupId> 53 <artifactId>spring-jdbc</artifactId> 54 <version>${spring.version}</version> 55 </dependency> 56 <dependency> 57 <groupId>org.springframework</groupId> 58 <artifactId>spring-webmvc</artifactId> 59 <version>${spring.version}</version> 60 </dependency> 61 <dependency> 62 <groupId>org.springframework</groupId> 63 <artifactId>spring-aop</artifactId> 64 <version>${spring.version}</version> 65 </dependency> 66 <dependency> 67 <groupId>org.springframework</groupId> 68 <artifactId>spring-context-support</artifactId> 69 <version>${spring.version}</version> 70 </dependency> 71 <dependency> 72 <groupId>org.springframework</groupId> 73 <artifactId>spring-test</artifactId> 74 <version>${spring.version}</version> 75 </dependency> 76 <!-- mybatis核心包 --> 77 <dependency> 78 <groupId>org.mybatis</groupId> 79 <artifactId>mybatis</artifactId> 80 <version>${mybatis.version}</version> 81 </dependency> 82 <!-- mybatis/spring包 --> 83 <dependency> 84 <groupId>org.mybatis</groupId> 85 <artifactId>mybatis-spring</artifactId> 86 <version>1.2.2</version> 87 </dependency> 88 <!-- 导入Mysql数据库链接jar包 --> 89 <dependency> 90 <groupId>mysql</groupId> 91 <artifactId>mysql-connector-java</artifactId> 92 <version>5.1.30</version> 93 </dependency> 94 <!-- 导入dbcp的jar包,用来在applicationContext.xml中配置数据库 --> 95 <dependency> 96 <groupId>commons-dbcp</groupId> 97 <artifactId>commons-dbcp</artifactId> 98 <version>1.2.2</version> 99 </dependency> 100 <!-- JSTL标签类 --> 101 <dependency> 102 <groupId>jstl</groupId> 103 <artifactId>jstl</artifactId> 104 <version>1.2</version> 105 </dependency> 106 <!-- 日志文件管理包 --> 107 <!-- log start --> 108 <dependency> 109 <groupId>log4j</groupId> 110 <artifactId>log4j</artifactId> 111 <version>${log4j.version}</version> 112 </dependency> 113 <!-- 格式化对象,方便输出日志 --> 114 <dependency> 115 <groupId>com.alibaba</groupId> 116 <artifactId>fastjson</artifactId> 117 <version>1.1.41</version> 118 </dependency> 119 <dependency> 120 <groupId>org.slf4j</groupId> 121 <artifactId>slf4j-api</artifactId> 122 <version>${slf4j.version}</version> 123 </dependency> 124 <dependency> 125 <groupId>org.slf4j</groupId> 126 <artifactId>slf4j-log4j12</artifactId> 127 <version>${slf4j.version}</version> 128 </dependency> 129 <!-- log end --> 130 <!-- 映入JSON --> 131 <dependency> 132 <groupId>org.codehaus.jackson</groupId> 133 <artifactId>jackson-mapper-asl</artifactId> 134 <version>1.9.13</version> 135 </dependency> 136 <!-- 上传组件包 --> 137 <dependency> 138 <groupId>commons-fileupload</groupId> 139 <artifactId>commons-fileupload</artifactId> 140 <version>1.3.1</version> 141 </dependency> 142 <dependency> 143 <groupId>commons-io</groupId> 144 <artifactId>commons-io</artifactId> 145 <version>2.4</version> 146 </dependency> 147 <dependency> 148 <groupId>commons-codec</groupId> 149 <artifactId>commons-codec</artifactId> 150 <version>1.9</version> 151 </dependency> 152 </dependencies> 153 <build> 154 <finalName>hongceshi</finalName> 155 <plugins> 156 <plugin> 157 <groupId>org.apache.maven.plugins</groupId> 158 <artifactId>maven-compiler-plugin</artifactId> 159 <version>3.5.1</version> 160 <configuration> 161 <source>1.8</source> 162 <target>1.8</target> 163 <encoding>UTF-8</encoding> 164 </configuration> 165 </plugin> 166 </plugins> 167 </build>
4.2 Spring与MyBatis的整合
4.1的jar包引入之后,首先进行Spring和MyBatis整合,然后再进行JUnit测试,先看一个项目结构图:
4.2.1 建立JDBC属性文件(有背景颜色部分需根据自己信息修改)
jdbc.properties
driver=com.mysql.jdbc.Driver url=jdbc:mysql://127.0.0.1:3306/projectmanagement?useUnicode=true&characterEncoding=UTF-8 username=root password=root #定义初始连接数 initialSize=0 #定义最大连接数 maxActive=20 #定义最大空闲 maxIdle=20 #定义最小空闲 minIdle=1 #定义最长等待时间 maxWait=60000
4.2.2 Log4j的配置(跳过此步也没影响)
为了方便调试,一般都会使用日志来输出信息,Log4j是Apache的一个开放源代码项目,通过使用Log4j,我们可以控制日志信息输送的目的地是控制台、文件、GUI组件,甚至是套接口服务器、NT的事件记录器、UNIX Syslog守护进程等;我们也可以控制每一条日志的输出格式;通过定义每一条日志信息的级别,我们能够更加细致地控制日志的生成过程。
Log4j的配置很简单,而且也是通用的,下面给出一个基本的配置,换到其他项目中也无需做多大的调整,如果想做调整或者想了解Log4j的各种配置,可以参考:Log4j配置详解
log4j.properties
1 #定义LOG输出级别 2 log4j.rootLogger=INFO,Console,File 3 #定义日志输出目的地为控制台 4 log4j.appender.Console=org.apache.log4j.ConsoleAppender 5 log4j.appender.Console.Target=System.out 6 #可以灵活地指定日志输出格式,下面一行是指定具体的格式 7 log4j.appender.Console.layout = org.apache.log4j.PatternLayout 8 log4j.appender.Console.layout.ConversionPattern=[%c] - %m%n 9 10 #文件大小到达指定尺寸的时候产生一个新的文件 11 log4j.appender.File = org.apache.log4j.RollingFileAppender 12 #指定输出目录 13 log4j.appender.File.File = logs/springmvcMybist/ssm.log 14 #定义文件最大大小 15 log4j.appender.File.MaxFileSize = 10MB 16 #输出所以日志,如果换成DEBUG表示输出DEBUG以上级别日志 17 log4j.appender.File.Threshold = ALL 18 log4j.appender.File.layout = org.apache.log4j.PatternLayout 19 log4j.appender.File.layout.ConversionPattern =[%p] [%d{yyyy-MM-dd HH\:mm\:ss}][%c]%m%n
4.2.3、建立spring-mybatis.xml配置文件
这个文件就是用来完成spring和mybatis的整合的。这里面也没多少行配置,主要的就是自动扫描,自动注入,配置数据库
spring-mybatis.xml
1 <?xml version="1.0" encoding="UTF-8"?> 2 <beans xmlns="http://www.springframework.org/schema/beans" 3 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" 4 xmlns:context="http://www.springframework.org/schema/context" 5 xmlns:mvc="http://www.springframework.org/schema/mvc" 6 xsi:schemaLocation="http://www.springframework.org/schema/beans 7 http://www.springframework.org/schema/beans/spring-beans-4.0.xsd 8 http://www.springframework.org/schema/context 9 http://www.springframework.org/schema/context/spring-context-4.0.xsd 10 http://www.springframework.org/schema/mvc 11 http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd"> 12 <!-- 自动扫描 --> 13 <context:component-scan base-package="com.tim" /> 14 15 <!-- 引入配置文件 --> 16 <bean id="propertyConfigurer" 17 class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> 18 <property name="location" value="classpath:jdbc.properties" /> 19 </bean> 20 21 <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" 22 destroy-method="close"> 23 <property name="driverClassName" value="${driver}" /> 24 <property name="url" value="${url}" /> 25 <property name="username" value="${username}" /> 26 <property name="password" value="${password}" /> 27 <!-- 初始化连接大小 --> 28 <property name="initialSize" value="${initialSize}"></property> 29 <!-- 连接池最大数量 --> 30 <property name="maxActive" value="${maxActive}"></property> 31 <!-- 连接池最大空闲 --> 32 <property name="maxIdle" value="${maxIdle}"></property> 33 <!-- 连接池最小空闲 --> 34 <property name="minIdle" value="${minIdle}"></property> 35 <!-- 获取连接最大等待时间 --> 36 <property name="maxWait" value="${maxWait}"></property> 37 </bean> 38 39 <!-- spring和MyBatis完美整合,不需要mybatis的配置映射文件 --> 40 <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> 41 <property name="dataSource" ref="dataSource" /> 42 <!-- 自动扫描mapping.xml文件 --> 43 <property name="mapperLocations" value="classpath:com/tim/dao/*.xml"></property> 44 </bean> 45 46 <!-- DAO接口所在包名,Spring会自动查找其下的类 --> 47 <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> 48 <property name="basePackage" value="com.tim.dao" /> 49 <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property> 50 </bean> 51 52 <!-- (事务管理)transaction manager, use JtaTransactionManager for global tx --> 53 <bean id="transactionManager" 54 class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> 55 <property name="dataSource" ref="dataSource" /> 56 </bean> 57 </beans>
4.2.4、JUnit测试
经过以上步骤(log4j不配也没影响),我们已经完成了Spring和mybatis的整合,这样我们就可以编写一段测试代码来试试是否成功了。
4.2.4.1 创建测试用表
既然我们需要测试,那么我们就需要在数据库中建立一个测试表,这个表建的很简单,SQL语句为:
Mysql新建数据库,执行下面语句
CREATE TABLE IF NOT EXISTS `projectinfo` ( `id` int(11) NOT NULL AUTO_INCREMENT, `projectName` varchar(100) NOT NULL, `projectManager` varchar(100) NOT NULL, `createTime` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP, `updateTime` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, PRIMARY KEY (`id`) ) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;
INSERT INTO `projectinfo` (`projectName`, `projectManager`) VALUES ('CME', 'Tim',);
4.2.4.2、创建Bean, Dao, Services类
bean: ProjectInfoBean
package com.tim.bean;
public class ProjectInfoBean { int id; String projectName; String projectManager;
public int getId() {
return id;
} public void setId(int id) { this.id = id; } public String getProjectName() { return projectName; } public void setProjectName(String projectName) { this.projectName = projectName; } public String getProjectManager() { return projectManager; } public void setProjectManager(String projectManager) { this.projectManager = projectManager; } }
dao: ProjectInfoDAO
package com.tim.dao;
import com.tim.bean.ProjectInfoBean; public interface ProjectInfoDAO { int deleteProjectInfoById(int id); int insertProjectInfo(ProjectInfoBean projectInfoBean); ProjectInfoBean selectProjectInfoById(int id); int updateProjectInfo(ProjectInfoBean projectInfoBean); }
dao: ProjectInfoDAO.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.tim.dao.ProjectInfoDAO" > <!-- mapping的对象,必须对应的DAO类一致 -->
<resultMap id="BaseResultMap" type="com.tim.bean.ProjectInfoBean" />
<select id="selectProjectInfoById" resultMap="BaseResultMap" parameterType="java.lang.Integer" >
select * from projectinfo where id = #{id}
</select>
<delete id="deleteProjectInfoById" parameterType="java.lang.Integer" >
delete from projectinfo where id = #{id}
</delete>
<insert id="insertProjectInfo" parameterType="com.tim.bean.ProjectInfoBean" >
insert into projectinfo (projectName, projectManager) values (#{projectName}, #{projectManager})
</insert>
<update id="updateProjectInfo" parameterType="com.tim.bean.ProjectInfoBean" >
update projectinfo set projectName = #{projectName}, projectManager = #{projectManager} where id = #{id}
</update>
</mapper>
service: IProjectInfoService.java
package com.tim.service; import com.tim.bean.ProjectInfoBean; public interface IProjectInfoService { public ProjectInfoBean getProjectInfoById (int id); } |
service.impl: ProjectInfoService.java
package com.tim.service.impl;
import javax.annotation.Resource;
import org.springframework.stereotype.Service;
import com.tim.bean.ProjectInfoBean;
import com.tim.dao.ProjectInfoDAO;
import com.tim.service.IProjectInfoService;
@Service("projectInfoService")
public class ProjectInfoService implements IProjectInfoService {
@Resource
private ProjectInfoDAO ProjectInfoDAO;
public ProjectInfoBean getProjectInfoById(int id) {
return this.ProjectInfoDAO.selectProjectInfoById(id);
}
}
4.2.4.4、建立测试类
测试类在src/test/java中建立,下面测试类中注释掉的部分是不使用Spring时,一般情况下的一种测试方法;如果使用了Spring那么就可以使用注解的方式来引入配置文件和类,然后再将service接口对象注入,就可以进行测试了。如果测试成功,表示Spring和Mybatis已经整合成功了。输出信息使用的是Log4j打印到控制台
TestMyBatis.java
package com.tim.test; import org.apache.log4j.Logger; import javax.annotation.Resource; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.test.context.ContextConfiguration; import org.springframework.test.context.junit4.SpringJUnit4ClassRunner; import com.alibaba.fastjson.JSON; import com.tim.bean.ProjectInfoBean; import com.tim.service.IProjectInfoService; @RunWith(SpringJUnit4ClassRunner.class) // 表示继承了这个类 @ContextConfiguration(locations = { "classpath:spring-mybatis.xml" }) public class TestMyBatis { private static Logger logger = Logger.getLogger(TestMyBatis.class); @Resource private IProjectInfoService projectInfoService = null; @Test public void test() { ProjectInfoBean projectInfoBean = projectInfoService.getProjectInfoById(1); logger.info(projectInfoBean); logger.info("projectInfo 转化为 json"); logger.info(JSON.toJSONString(projectInfoBean)); } }
开始测试:
项目右键Maven->Update Project...(重点),等更新完,右击项目->Run As->JUnit Test
4.3、整合SpringMVC
上面已经完成了2大框架的整合,SpringMVC的配置文件单独放,然后在web.xml中配置整合
4.3.1、配置spring-mvc.xml
主要是自动扫描控制器,视图模式,注解的启动这三个
spring-mvc.xml
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd"> <!--避免IE执行AJAX时,返回JSON出现下载文件 --> <bean id="mappingJacksonHttpMessageConverter" class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"> <property name="supportedMediaTypes"> <list> <value>text/html;charset=UTF-8</value> </list> </property> </bean> <!-- 启动SpringMVC的注解功能,完成请求和注解POJO的映射 --> <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"> <property name="messageConverters"> <list> <!-- JSON转换器 --> <ref bean="mappingJacksonHttpMessageConverter" /> </list> </property> </bean> <!-- 对静态资源的访问 --> <!-- <mvc:resources mapping="/js/**" location="/js/" /> <mvc:resources mapping="/css/**" location="/css/" /> --> <!-- 自动扫描该包,使SpringMVC认为包下用了@controller注解的类是控制器 --> <context:component-scan base-package="com.tim.controller" /> <!-- 添加注解驱动 --> <mvc:annotation-driven enable-matrix-variables="true" /> <!-- 允许对静态资源文件的访问 --> <mvc:default-servlet-handler /> <!-- 定义跳转的文件的前后缀 ,视图模式配置 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <!-- 这里的配置我的理解是自动给后面action的方法return的字符串加上前缀和后缀,变成一个 可用的url地址 --> <property name="prefix" value="/WEB-INF/jsp/" /> <property name="suffix" value=".jsp" /> </bean> <!-- 配置文件上传,如果没有使用文件上传可以不用配置,当然如果不配,那么配置文件中也不必引入上传组件包 --> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <!-- 默认编码 --> <property name="defaultEncoding" value="UTF-8" /> <!-- 文件大小最大值 --> <property name="maxUploadSize" value="10485760000" /> <!-- 内存中的最大值 --> <property name="maxInMemorySize" value="40960" /> </bean> </beans>
4.3.2、配置web.xml文件
这里面对spring-mybatis.xml的引入以及配置的spring-mvc的Servlet就是为了完成SSM整合,之前2框架整合不需要在此处进行任何配置。配置一样有详细注释,不多解释了。
web.xml
1 <?xml version="1.0" encoding="UTF-8"?> 2 <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 3 xmlns="http://java.sun.com/xml/ns/javaee" 4 xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" 5 version="3.0"> 6 <display-name>Archetype Created Web Application</display-name> 7 8 <!-- Spring和mybatis的配置文件 --> 9 <context-param> 10 <param-name>contextConfigLocation</param-name> 11 <param-value>classpath:spring-mybatis.xml</param-value> 12 </context-param> 13 14 <!-- 编码过滤器 --> 15 <filter> 16 <filter-name>encodingFilter</filter-name> 17 <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> 18 <async-supported>true</async-supported> 19 <init-param> 20 <param-name>encoding</param-name> 21 <param-value>UTF-8</param-value> 22 </init-param> 23 </filter> 24 <filter-mapping> 25 <filter-name>encodingFilter</filter-name> 26 <url-pattern>/*</url-pattern> 27 </filter-mapping> 28 29 <!-- Spring监听器 --> 30 <listener> 31 <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> 32 </listener> 33 34 <!-- 防止Spring内存溢出监听器 --> 35 <listener> 36 <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class> 37 </listener> 38 39 <!-- Spring MVC servlet --> 40 <servlet> 41 <servlet-name>SpringMVC</servlet-name> 42 <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> 43 <init-param> 44 <param-name>contextConfigLocation</param-name> 45 <param-value>classpath:spring-mvc.xml</param-value> 46 </init-param> 47 <load-on-startup>1</load-on-startup> 48 <async-supported>true</async-supported> 49 </servlet> 50 <servlet-mapping> 51 <servlet-name>SpringMVC</servlet-name> 52 <!-- 此处可以可以配置成*.do,对应struts的后缀习惯 --> 53 <url-pattern>/</url-pattern> 54 </servlet-mapping> 55 56 <welcome-file-list> 57 <welcome-file>/index.html</welcome-file> 58 <welcome-file>/index.jsp</welcome-file> 59 </welcome-file-list> 60 </web-app>
4.3.3、测试
至此已经完成了SSM三大框架的整合了,接下来测试一下,如果成功了,那么恭喜你,如果失败了,继续调试吧,作为程序员就是不停的与BUG做斗争!
4.3.3.1、新建jsp页面
projectInfo.jsp 此页面仅输出一下项目名称,完成一个完整的简单流程
projectInfo.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>测试</title> </head> <body>${projectInfoBean.projectName}</body> </html>
4.3.3.2、建立ProjectInfoController类
ProjectInfoController.java
package com.tim.controller; import javax.annotation.Resource; import javax.servlet.http.HttpServletRequest; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import com.tim.bean.ProjectInfoBean; import com.tim.service.IProjectInfoService; @Controller @RequestMapping("/projectInfo") public class ProjectInfoController { @Resource private IProjectInfoService projectInfoService; @RequestMapping("/showProjectById") public String toIndex(HttpServletRequest request, Model model) { int projectInfoId = Integer.parseInt(request.getParameter("projectInfoId")); // 页面参数名为projectInfoId ProjectInfoBean projectInfoBean = this.projectInfoService.getProjectInfoById(projectInfoId); model.addAttribute("projectInfoBean", projectInfoBean); // 对应projectInfo.jsp页面中的${projectInfoBean.projectName} return "projectInfo"; // 返回的string值为projectInfo.jsp的文件名,表示返回结果映射到projectInfo.jsp文件上 } }
启动项目,浏览器输入http://localhost:8080/project/projectInfo/showProjectById?projectInfoId=1
其中project对应为项目名称;
projectInfo对应为ProjectInfoController.java类的RequestMapping("projectInfo");
showProjectById对应为ProjectInfoController.java类中toIndex方法的RequestMapping("showProjectById");
projectInfoId对应为ProjectInfoController.java类中toIndex方法中的request.getParameter("projectInfoId")
至此SSM框架整合成功。
但是,可能会遇到一个问题:
启动Tomcat时出现如下报错:
解决方法:
1. 右键项目->Properties;
2. 选择Deployment Assembly,在右边点击Add按钮,在弹出的窗口中选择Java Build Path Entries
3. 点击Next,选择Maven Dependencies,点击Finish,然后可以看到已经把Maven Dependencies添加到Web应用结构中了
4. Clean Project,重新部署项目,问题解决。
5. 如果问题还是存在,可以尝试修改Server的Server Locations为Use Tomcat installation